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PERSNICKETY® Brand Odor Countervailant™
312E Formula is compounded to address the highly
complex malodors associated with the biological
decomposition of sludges and high-strength liquid
wastes. Such wastes have a high Biochemical Oxygen
Demand (BOD), and it is impractical and/or impossible
to maintain free or chemically uncombined oxygen (DO)
in the solutions. Consequently the biological process
is always anaerobic. Anaerobic bacteria must obtain
their oxygen by chemically breaking down organic
compounds which contain combined oxygen. This
reductive process produces malodorous by-products. The
type of nuisance malodors produced depends on the
substrates available.
The
rotten egg smell of hydrogen sulfide (H2S) is a common
by-product as is the pungent, stinging odor of ammonia
(NH3). Other sulfides, mercaptans, amines, indole and
skatole compounds are also common. In addition to
available macro organic substrates, many other factors
influence the types and amounts of malodors produced
-- pH, temperature, retention time, inorganic ions,
trace elements, vitamins, iron-chelating compounds,
amino acids, unsaturated fatty acids, nucleic acid
bases, exoenzymes, to name a few.
Such
complex conditions are most often too rigorous for the
effective use of chemical oxidants and metallic salts,
which work well on only a portion of the spectrum of
malodors and under narrow operating conditions.
Biocides are environmentally unsound as odor control
agents because they stop the necessary reductive
process. Masking agents and counteractants can be
overwhelmed. (See Syneco Systems, Inc.
FORM NO.
151, for greater detail.) 312E is the most broadly
capable formulation of all PERSNICKETY®
Brand Odor Countervailant™ products and
provides the following very important advantages:
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Formulated
specifically for the complexities inherent in
sludges and high-strength wastes.
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Functions
effectively in all field ranges of temperature and
pH.
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Is
not affected by the presence of non-malodorous
organics.
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IMPORTANT
NOTE: Because 312E Formula works so
effectively, pay special attention to appropriate
safety procedures when entering confined spaces.
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Contains
no toxic materials and forms no toxic by-products.
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Is
non-explosive, non-flammable and non-corrosive.
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Biodegrades
fully and forms no damaging decomposition
by-products.
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Meets
national and international health and safety
standards.
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Normally
reduces chemical costs for effective
complex-malodor control.
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Potentially
allows avoidance of litigation costs via more
effective malodor control, and improves operator
morale and productivity.
Application rates for 312E Sludge and High-Strength
Waste Formula are largely dictated by the intensity of
malodor. The proper rate establishes an equilibrium
between malodor and 312E. This equilibrium is
illustrated below.
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In
practice, a constant level of malodor is not always
present. Intensity variations occur. Therefore, many
customers choose to operate with a faint odor of 312E
present to act as an olfactory guide in order to
provide a buffer zone.
312E
is normally fed into waste streams, sludge and slurry
holding, consolidation and thickening tanks by
automatic dosing pumps. If the holding vessel is
equipped for mixing, an automatic or manual batch dose
is appropriate. For 312E to be most effective, it is
very important that it is dispersed as homogeneously
as possible throughout the material being treated in
order to insure full contact and treatment. This is
best accomplished by diluting the appropriate amount
of 312E with water to make up a 1-2% solution. The
diluted solution is then fed or mixed into the waste
stream or holding vessel.
The
necessary dosage rates must be determined on a
case-by-case basis. Good starting guidelines can be
provided, however. An exhaustive list of waste types
would be nearly endless. The malodorous materials
listed below represent a fairly wide spectrum of odor
intensity. Weigh the intensity of malodors under
consideration against those listed, and increase or
decrease the recommended starting application rate
accordingly. Initial assessments can be readily made
on the laboratory bench.
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